As well as the helicopter, police in Hampshire had to deploy dog teams and 70 officers to break up a fight which erupted between 30 people at the party on Saturday night. Five teenage boys were arrested.

Seva Nurueva, 15, who organised the party with her 17-year-old neighbour Jordan Wright, apologised for advertising the event on the social networking site.

She said: "We are really sorry for all the damage we caused. It was scary – I did not really know what to do. All I did was cry."

Miss Nurueva's stepfather Laurence Aghabi, said just 80 people had been invited to the garden party, which started at 8pm, but that hundreds of uninvited teenagers arrived with alcohol and the event quickly spun out of control.

"I never thought this would happen when we allowed them to have a quiet party," he said.